Fix discrepancy between trunk and bleeding edge.

dart/tests/lib/async/future2_test.dart

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// TODO(ajohnsen): This test needs to be updated.
-//                 Can Dart2JS on V8 somehow run it?
-
-// Tests for Future.immediate
-import 'dart:async';
-import 'dart:isolate';
-
-testImmediate() {
-  final future = new Future<String>.immediate("42");
-  future.then((x) => Expect.equals("42", x));
-}
-
-// Tests for getters (value, exception, isComplete, isValue)
-
-testNeverComplete() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-  future.then((v) => Except.fails("Value not expected"));
-  future.catchError((e) => Except.fails("Value not expected"));
-}
-
-testComplete() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-
-  completer.complete(3);
-
-  future.then((v) => Expect.equals(3, v));
-}
-
-// Tests for [then]
-
-testCompleteWithSuccessHandlerBeforeComplete() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-
-  int before;
-  future.then((int v) { before = v; });
-  Expect.isNull(before);
-  completer.complete(3);
-
-  Expect.equals(3, before);
-}
-
-testCompleteWithSuccessHandlerAfterComplete() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-
-  int after;
-  completer.complete(3);
-  Expect.isNull(after);
-
-  future.then((int v) { after = v; });
-
-  Expect.equals(3, after);
-}
-
-testCompleteManySuccessHandlers() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-  int before;
-  int after1;
-  int after2;
-
-  future.then((int v) { before = v; });
-  completer.complete(3);
-  future.then((int v) { after1 = v; });
-  future.then((int v) { after2 = v; });
-
-  Expect.equals(3, before);
-  Expect.equals(3, after1);
-  Expect.equals(3, after2);
-}
-
-// Tests for [handleException]
-
-testException() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-  final ex = new Exception();
-//  future.catchError((e) => print("got error"));//Expect.equals(e, ex));
-  future.then((v) {print(v);})
-        .catchError((e) => Expect.equals(e.error, ex));
-  completer.completeError(ex);
-}
-
-testExceptionNoSuccessListeners() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-  final ex = new Exception();
-  completer.completeException(ex); // future.then is not called, so no exception
-}
-
-testExceptionHandler() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-  final ex = new Exception();
-
-  var ex2;
-  future.catchError((e) { ex2 = e.error; });
-  completer.completeError(ex);
-  Expect.equals(ex, ex2);
-}
-
-testExceptionHandlerReturnsTrue() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-  final ex = new Exception();
-
-  bool reached = false;
-  future.catchError((e) { });
-  future.catchError((e) { reached = true; }, test: (e) => false)
-        .catchError((e) {});
-  completer.completeError(ex);
-  Expect.isFalse(reached);
-}
-
-testExceptionHandlerReturnsTrue2() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-  final ex = new Exception();
-
-  bool reached = false;
-  future.catchError((e) { }, test: (e) => false)
-        .catchError((e) { reached = true; });
-  completer.completeError(ex);
-  Expect.isTrue(reached);
-}
-
-testExceptionHandlerReturnsFalse() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-  final ex = new Exception();
-
-  bool reached = false;
-
-  future.catchError((e) { });
-
-  future.catchError((e) { reached = true; }, test: (e) => false)
-        .catchError((e) { });
-
-  completer.completeError(ex);
-
-  Expect.isFalse(reached);
-}
-
-testExceptionHandlerReturnsFalse2() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-  final ex = new Exception();
-
-  bool reached = false;
-  future.handleException((e) { return false; });
-  future.handleException((e) { reached = true; return false; }); // overshadowed
-  completer.completeException(ex); // future.then is not called, so no exception
-  Expect.isTrue(reached);
-}
-
-testExceptionHandlerAfterCompleteThenNotCalled() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-  final ex = new Exception();
-
-  var ex2;
-  completer.completeException(ex);
-  future.handleException((e) { ex2 = e; return true; });
-  future.then((e) { });
-  Expect.equals(ex, ex2);
-}
-
-testExceptionHandlerAfterCompleteReturnsFalseThenThrows() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-  final ex = new Exception();
-
-  var ex2;
-  completer.completeException(ex);
-  future.handleException((e) { ex2 = e; return false; });
-  Expect.throws(() { future.then((e) { }); });
-  Expect.equals(ex, ex2);
-}
-
-// Tests for accessing the exception call stack.
-
-testCallStackThrowsIfNotComplete() {
-  var exception;
-  try {
-    new Completer().future.stackTrace;
-  } catch (ex) {
-    exception = ex;
-  }
-
-  Expect.isTrue(exception is FutureNotCompleteException);
-}
-
-testCallStackIsNullIfCompletedSuccessfully() {
-  Expect.isNull(new Future.immediate('blah').stackTrace);
-}
-
-testCallStackReturnsCallstackPassedToCompleteException() {
-  final completer = new Completer();
-  final future = completer.future;
-
-  final stackTrace = 'fake stack trace';
-  completer.completeException(new Exception(), stackTrace);
-  Expect.equals(stackTrace, future.stackTrace);
-}
-
-testCallStackIsCapturedIfTransformCallbackThrows() {
-  final completer = new Completer();
-  final transformed = completer.future.then((_) {
-    throw 'whoops!';
-  });
-
-  final stackTrace = 'fake stack trace';
-  completer.complete('blah');
-  Expect.isNotNull(transformed.stackTrace);
-}
-
-testCallStackIsCapturedIfChainCallbackThrows() {
-  final completer = new Completer();
-  final chained = completer.future.chain((_) {
-    throw 'whoops!';
-  });
-
-  final stackTrace = 'fake stack trace';
-  completer.complete('blah');
-  Expect.isNotNull(chained.stackTrace);
-}
-
-testCallStackIsPreservedIfExceptionIsRethrownInTransformException() {
-  final completer = new Completer();
-  var chained = completer.future.chain((_) {
-    throw 'whoops!';
-  });
-  var transformed = chained.transformException((e) {
-    throw e;
-  });
-
-  completer.complete('blah');
-  Expect.equals(transformed.stackTrace, chained.stackTrace);
-}
-
-// Tests for mixed usage of [onComplete], [then], and [handleException]
-
-testCompleteWithCompletionAndSuccessHandlers() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-
-  var valueFromSuccessHandler;
-  var valueFromCompletionHandler;
-  future.onComplete((f) {
-    Expect.isNotNull(valueFromSuccessHandler);
-    valueFromCompletionHandler = f.value;
-  });
-  future.then((v) {
-    Expect.isNull(valueFromCompletionHandler);
-    valueFromSuccessHandler = v;
-  });
-  completer.complete(42);
-  Expect.equals(42, valueFromSuccessHandler);
-  Expect.equals(42, valueFromCompletionHandler);
-  Expect.equals(42, future.value);
-}
-
-testExceptionWithCompletionAndSuccessHandlers() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-  final ex = new Exception();
-
-  var exceptionFromCompleteHandler;
-  future.onComplete((f) {
-    Expect.equals(future, f);
-    Expect.isFalse(f.hasValue);
-    exceptionFromCompleteHandler = f.exception;
-  });
-  future.then((v) => Expect.fail("Should not succeed"));
-  Expect.throws(() => completer.completeException(ex), (e) => e.source == ex);
-  Expect.equals(ex, exceptionFromCompleteHandler);
-}
-
-testExceptionWithCompletionAndSuccessAndExceptionHandlers() {
-  final completer = new Completer<int>();
-  final future = completer.future;
-  final ex = new Exception();
-
-  var exceptionFromCompleteHandler;
-  var exceptionFromExceptionHandler;
-  future.onComplete((f) {
-    Expect.equals(future, f);
-    Expect.isFalse(f.hasValue);
-    exceptionFromCompleteHandler = f.exception;
-  });
-  future.handleException((e) {
-    exceptionFromExceptionHandler = e;
-    return true;
-  });
-  future.then((v) => Expect.fail("Should not succeed"));
-  completer.completeException(ex);
-  Expect.equals(ex, exceptionFromCompleteHandler);
-  Expect.equals(ex, exceptionFromExceptionHandler);
-}
-
-// Tests for Future.transform
-
-testTransformSuccess() {
-  final completer = new Completer<String>();
-  final transformedFuture = completer.future.then((x) => "** $x **");
-  Expect.isFalse(transformedFuture.isComplete);
-  completer.complete("42");
-  Expect.equals("** 42 **", transformedFuture.value);
-}
-
-testTransformFutureFails() {
-  final completer = new Completer<String>();
-  final error = new Exception("Oh no!");
-  final transformedFuture = completer.future.then((x) {
-    Expect.fail("transformer shouldn't be called");
-  });
-  Expect.isFalse(transformedFuture.isComplete);
-  completer.completeException(error);
-  Expect.equals(error, transformedFuture.exception);
-}
-
-testTransformTransformerFails() {
-  final completer = new Completer<String>();
-  final error = new Exception("Oh no!");
-  final transformedFuture = completer.future.then((x) { throw error; });
-  Expect.isFalse(transformedFuture.isComplete);
-  transformedFuture.then((v) => null);
-  Expect.throws(() => completer.complete("42"), (e) => e.source == error);
-  Expect.equals(error, transformedFuture.exception);
-}
-
-// Tests for Future.chain
-
-testChainSuccess() {
-  final completerA = new Completer<String>();
-  final completerB = new Completer<String>();
-  final chainedFuture = completerA.future.chain((x) {
-    Expect.equals("42", x);
-    return completerB.future;
-  });
-  Expect.isFalse(chainedFuture.isComplete);
-  completerA.complete("42");
-  Expect.isFalse(chainedFuture.isComplete);
-  completerB.complete("43");
-  Expect.equals("43", chainedFuture.value);
-}
-
-testChainFirstFutureFails() {
-  final completerA = new Completer<String>();
-  final error = new Exception("Oh no!");
-  final chainedFuture = completerA.future.chain((x) {
-    Expect.fail("transformer shouldn't be called");
-  });
-  Expect.isFalse(chainedFuture.isComplete);
-  completerA.completeException(error);
-  Expect.equals(error, chainedFuture.exception);
-}
-
-testChainTransformerFails() {
-  final completerA = new Completer<String>();
-  final error = new Exception("Oh no!");
-  final chainedFuture = completerA.future.chain((x) {
-    Expect.equals("42", x);
-    throw error;
-  });
-  chainedFuture.then((v) => null);
-  Expect.isFalse(chainedFuture.isComplete);
-  Expect.throws(() => completerA.complete("42"), (e) => e.source == error);
-  Expect.equals(error, chainedFuture.exception);
-}
-
-testChainSecondFutureFails() {
-  final completerA = new Completer<String>();
-  final completerB = new Completer<String>();
-  final error = new Exception("Oh no!");
-  final chainedFuture = completerA.future.chain((x) {
-    Expect.equals("42", x);
-    return completerB.future;
-  });
-  Expect.isFalse(chainedFuture.isComplete);
-  completerA.complete("42");
-  Expect.isFalse(chainedFuture.isComplete);
-  completerB.completeException(error);
-  Expect.equals(error, chainedFuture.exception);
-}
-
-// Tests for Future.transformException
-
-testTransformExceptionCompletesNormally() {
-  final completer = new Completer<String>();
-  var called = false;
-
-  final transformedFuture = completer.future.transformException((ex) {
-    Expect.fail("should not get here");
-  });
-
-  completer.complete("value");
-  Expect.isTrue(transformedFuture.isComplete);
-  Expect.equals("value", transformedFuture.value);
-}
-
-testTransformExceptionThrows() {
-  final completer = new Completer<String>();
-  var called = false;
-
-  final transformedFuture = completer.future.transformException((ex) {
-    Expect.equals("original error", ex);
-    called = true;
-    throw "transformed error";
-  });
-
-  completer.completeException("original error");
-  Expect.isTrue(called);
-  Expect.isTrue(transformedFuture.isComplete);
-  Expect.equals("transformed error", transformedFuture.exception);
-}
-
-testTransformExceptionReturns() {
-  final completer = new Completer<String>();
-  var called = false;
-
-  final transformedFuture = completer.future.transformException((ex) {
-    Expect.equals("original error", ex);
-    called = true;
-    return "transformed value";
-  });
-
-  completer.completeException("original error");
-  Expect.isTrue(called);
-  Expect.isTrue(transformedFuture.isComplete);
-  Expect.equals("transformed value", transformedFuture.value);
-}
-
-testTransformExceptionReturnsAFuture() {
-  final completer = new Completer<String>();
-  var called = false;
-
-  final returnedCompleter = new Completer<String>();
-
-  final transformedFuture = completer.future.transformException((ex) {
-    Expect.equals("original error", ex);
-    called = true;
-    return returnedCompleter.future;
-  });
-
-  completer.completeException("original error");
-  Expect.isTrue(called);
-  Expect.isFalse(transformedFuture.isComplete);
-
-  returnedCompleter.complete("transformed value");
-  Expect.isTrue(transformedFuture.isComplete);
-  Expect.equals("transformed value", transformedFuture.value);
-}
-
-// Tests for branching exceptions
-
-testExceptionTravelsAlongBothBranches() {
-  var results = <int>[];
-
-  var completer = new Completer();
-  var branch1 = completer.future.then((_) => null);
-  var branch2 = completer.future.then((_) => null);
-
-  branch1.handleException((e) {
-    results.add(1);
-    return true;
-  });
-
-  branch2.handleException((e) {
-    results.add(2);
-    return true;
-  });
-
-  completer.completeException("error");
-  Expect.setEquals([1, 2], results);
-}
-
-testExceptionTravelsAlongBothBranchesAfterComplete() {
-  var results = <int>[];
-
-  var completer = new Completer();
-  completer.completeException("error");
-
-  var branch1 = completer.future.then((_) => null);
-  var branch2 = completer.future.then((_) => null);
-
-  branch1.handleException((e) {
-    results.add(1);
-    return true;
-  });
-
-  branch2.handleException((e) {
-    results.add(2);
-    return true;
-  });
-
-  Expect.setEquals([1, 2], results);
-}
-
-testExceptionIsHandledInBaseAndBranch() {
-  var results = <String>[];
-
-  var completer = new Completer();
-  var branch = completer.future.then((_) => null);
-
-  completer.future.handleException((e) {
-    results.add("base");
-    return true;
-  });
-
-  branch.handleException((e) {
-    results.add("branch");
-    return true;
-  });
-
-  completer.completeException("error");
-  Expect.setEquals(["base", "branch"], results);
-}
-
-testExceptionIsHandledInBaseAndBranchAfterComplete() {
-  var results = <String>[];
-
-  var completer = new Completer();
-  completer.completeException("error");
-
-  var branch = completer.future.then((_) => null);
-
-  completer.future.handleException((e) {
-    results.add("base");
-    return true;
-  });
-
-  branch.handleException((e) {
-    results.add("branch");
-    return true;
-  });
-
-  Expect.setEquals(["base", "branch"], results);
-}
-
-main() {
-//  /*
-  testImmediate();
-  testNeverComplete();
-  testComplete();
-  testCompleteWithSuccessHandlerBeforeComplete();
-  testCompleteWithSuccessHandlerAfterComplete();
-  testCompleteManySuccessHandlers();
-  testException();
-  testExceptionHandler();
-  testExceptionHandlerReturnsTrue();
-  testExceptionHandlerReturnsTrue2();
-  testExceptionHandlerReturnsFalse();
-//  */
-  /*
-  */
-  /*
-  testExceptionHandlerReturnsFalse2();
-  testExceptionHandlerAfterCompleteThenNotCalled();
-  testExceptionHandlerAfterCompleteReturnsFalseThenThrows();
-  testCallStackThrowsIfNotComplete();
-  testCallStackIsNullIfCompletedSuccessfully();
-  testCallStackReturnsCallstackPassedToCompleteException();
-  testCallStackIsCapturedIfTransformCallbackThrows();
-  testCallStackIsCapturedIfChainCallbackThrows();
-  testCallStackIsPreservedIfExceptionIsRethrownInTransformException();
-  testCompleteWithCompletionAndSuccessHandlers();
-  testExceptionWithCompletionAndSuccessHandlers();
-  testExceptionWithCompletionAndSuccessAndExceptionHandlers();
-  testTransformSuccess();
-  testTransformFutureFails();
-  testTransformTransformerFails();
-  testChainSuccess();
-  testChainFirstFutureFails();
-  testChainTransformerFails();
-  testChainSecondFutureFails();
-  testTransformExceptionCompletesNormally();
-  testTransformExceptionThrows();
-  testTransformExceptionReturns();
-  testTransformExceptionReturnsAFuture();
-  testExceptionTravelsAlongBothBranches();
-  testExceptionTravelsAlongBothBranchesAfterComplete();
-  testExceptionIsHandledInBaseAndBranch();
-  testExceptionIsHandledInBaseAndBranchAfterComplete();
-  */
-}